Activation error

We are a family of 7, 6 of us need to file,  so I purchased TT Home & Business (download) and reached my E-file limit. My wife,  purchased and installed/activated TT Home and Business on her computer, but didn't change the account login so it registered under me.  Now when she goes to login to her account and do her taxes, it says software (error message stating already activated on another account). How do I get the new (purchased today) changed to my wife's account so she can use it on her computer?